Table 1 Demographic characteristics of respondents and weighted monthly prevalence of acute gastrointestinal illness (AGI) in the 4 weeks prior to interview in Gansu Province, northwest China, June 2012–May 2013 (n = 2094)
Variable | Proportion of residents | Proportion of survey respondents | Monthly prevalence of AGI | P-value | |
|---|---|---|---|---|---|
% | (95% CI) | ||||
Sex | 0.859 | ||||
Male | 51.1 | 75.5 | 8.6 | (6.9–10.3) | |
Female | 48.9 | 24.5 | 8.4 | (6.7–10.1) | |
Age (years) | < 0.01 | ||||
0–4 | 5.4 | 2.1 | 12.4 | (6.3–18.5) | |
5–14 | 12.7 | 3.2 | 19.2 | (14.4–23.9) | |
15–24 | 18.6 | 4.3 | 11.9 | (8.7–15.2) | |
25–44 | 32.6 | 33.5 | 5.2 | (3.5–6.9) | |
45–64 | 22.4 | 43.6 | 4.4 | (2.6–6.3) | |
≥ 65 | 8.2 | 13.3 | 5.9 | (2.4–9.4) | |
Education | < 0.01 | ||||
Preschool children | 6.5 | 2.4 | 11.5 | (6.2–16.8) | |
Illiterate | 9.6 | 10.0 | 7.3 | (3.4–11.2) | |
Primary school | 32.5 | 29.3 | 11.4 | (8.7–14.1) | |
Secondary school | 31.2 | 40.6 | 4.7 | (3.2– 6.2) | |
High school and above | 20.2 | 17.6 | 10.5 | (7.8–13.2) | |
No responsea | — b | ||||
Yearly household income (CNY) | < 0.01 | ||||
0–19999 | NA | 26.0 | 3.3 | (1.6–5.0) | |
20000–49999 | NA | 63.7 | 9.1 | (7.6–10.6) | |
≥ 50000 | NA | 9.6 | 13.7 | (9.7–17.6) | |
No responsea | 0.7 | ||||
Household size (number of person) | < 0.01 | ||||
1–2 | 29.9 | 18.4 | 3.1 | (1.1–5.0) | |
≥ 3 | 70.1 | 81.6 | 9.4 | (8.1–10.8) | |
Household type | 0.013 | ||||
No residents < 18 years | NA | 42.6 | 6.5 | (4.7–8.2) | |
At least one resident < 18 years | NA | 57.4 | 9.7 | (8.1–11.3) | |
Residence | < 0.01 | ||||
Urban | 35.9 | 23.5 | 11.7 | (9.4–14.0) | |
Rural | 64.1 | 76.5 | 6.7 | (5.4–8.1) | |
Season | 0.045 | ||||
Winter | NA | 25.0 | 8.1 | (5.9–10.3) | |
Spring | NA | 25.2 | 9.7 | (7.1–12.2) | |
Summer | NA | 24.7 | 10.8 | (7.8–13.7) | |
Autumn | NA | 25.1 | 6.0 | (4.0–8.0) | |
Sentinel site | < 0.01 | ||||
Baiyin | 18.8 | 16.5 | 1.4 | (0.2–2.6) | |
Liangzhou | 64.5 | 62.8 | 5.6 | (4.4–6.9) | |
Qingcheng | 16.7 | 20.7 | 24.0 | (19.9–28.1) | |